That article doesn't bust some myth about net spend, he just says it's a bit more complicated- when it really isn't. Factoring in player salaries and how clubs structure the reporting of the payments isn't mind blowing, nor does it change that much of the overall picture.

It is more complicated and considering it's the clubs finances, they care about the complications.

Real Madrdi doesn't care that it's 55m in profit on net spend since 2014. They care that they're making the most of the budget per season and not bankrupting the club. Net spent, just like a transfer fee alone, is an unimportant number to a club.